Toggle the SCU reset before hardware initialization.
Signed-off-by: Jacky Chou <jacky_chou@xxxxxxxxxxxxxx>
---
drivers/net/ethernet/faraday/ftgmac100.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 17ec35e75a65..cae23b712a6d 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c
@@ -9,6 +9,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/clk.h>
+#include <linux/reset.h>
#include <linux/dma-mapping.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
@@ -98,6 +99,7 @@ struct ftgmac100 {
struct work_struct reset_task;
struct mii_bus *mii_bus;
struct clk *clk;
+ struct reset_control *rst;
/* AST2500/AST2600 RMII ref clock gate */
struct clk *rclk;
@@ -1969,10 +1971,29 @@ static int ftgmac100_probe(struct platform_device *pdev)
}
if (priv->is_aspeed) {
+ struct reset_control *rst;
+
err = ftgmac100_setup_clk(priv);
if (err)
goto err_phy_connect;
+ rst = devm_reset_control_get_optional(priv->dev, NULL);
+ if (IS_ERR(rst))
+ goto err_register_netdev;
+ priv->rst = rst;
+
+ err = reset_control_assert(priv->rst);
+ if (err) {
+ dev_err(priv->dev, "Failed to reset mac (%d)\n", err);
+ goto err_register_netdev;
+ }
+ usleep_range(10000, 20000);
+ err = reset_control_deassert(priv->rst);
+ if (err) {
+ dev_err(priv->dev, "Failed to deassert mac reset (%d)\n", err);
+ goto err_register_netdev;
+ }
+
/* Disable ast2600 problematic HW arbitration */
if (of_device_is_compatible(np, "aspeed,ast2600-mac"))
iowrite32(FTGMAC100_TM_DEFAULT,
--
2.25.1
